Horst Langfeld

Person

Grenzach-Wyhlen, DE

People

Patents Grantslast 30 patents

Information Patent Grant
Process for the preparation of azo dyes
- Patent number 5,606,034
- Issue date Feb 25, 1997
- Ciba-Geigy Corporation
- Horst Langfeld
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for the preparation of metallizable azo dyes by carrying ou...
- Patent number 5,196,518
- Issue date Mar 23, 1993
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for controlling and optimising industrial processes for the...
- Patent number 5,153,140
- Issue date Oct 6, 1992
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for the preparation of mono- and polyazo dyes
- Patent number 5,116,955
- Issue date May 26, 1992
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for the preparation of azo dyes by carrying out coupling in...
- Patent number 5,026,830
- Issue date Jun 25, 1991
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Process for the preparation of polyazo dyes
- Patent number 4,996,302
- Issue date Feb 26, 1991
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Polyazo dyes obtained by successive coupling of H-acid and two furt...
- Patent number 4,988,804
- Issue date Jan 29, 1991
- Ciba-Geigy Corporation
- Horst Langfeld
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...

Horst Langfeld

Person

Patents Grantslast 30 patents

Process for the preparation of azo dyes

Process for the preparation of metallizable azo dyes by carrying ou...

Process for controlling and optimising industrial processes for the...

Process for the preparation of mono- and polyazo dyes

Process for the preparation of azo dyes by carrying out coupling in...

Process for the preparation of polyazo dyes

Polyazo dyes obtained by successive coupling of H-acid and two furt...